This video explains how 19th century French physicist Jules Antoine Lissajous used tuning forks to map out two-dimensional ...

To calculate the perimeter, label and add up the length of each side. This shape is made from two rectangles. What is the perimeter of this shape? First, calculate the missing lengths \(x\) and \(y\).

The perimeter is the total distance around the edge of a 2D shape. Examples of units of distance are millimetres (mm), centimetres (cm) and metres (m). The perimeter of any 2D shape can be found ...

Our work aims to do the same thing for three, four and five-dimensional shapes - to create a directory that lists all the geometric building blocks and breaks down each one's properties using ...

In other words, are there characteristics of each shape you could measure ahead of time to determine whether they’re scissors congruent? For two-dimensional shapes, the answer is easy: Just determine ...